-analog stick that wears off really easily
-big and nice dpad, not those circles with a cross embedded on top like the xbox360 controller.
-6 button layout on the front, which would be great for fighting games that use 6 buttons (very few on them on the n64)
-3 pronged dildo

GCN has:

-An actual analog stick thats good
- c-buttons were turned into a hard to grasp second stick
-Crappy shoulder buttons which are pressure sensitive
-4 buttons on front in a very weird position
-goddam tiny dpad